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为了研制耐磨性好、使用寿命长的阀门密封材料,探索堆焊层性能与材料组织结构的关系,对Cr-Mn-B系自动堆焊阀门密封面材料做了组织结构分析。本文用现代金相分析中各种技术,包括恒电位浸蚀、电解深浸蚀;光学显微镜及扫描电镜观察磨面的组织及其三维形貌;定量电解提取,测定第二相的含量;磁法测铁素体含量;X射线衍射结构分析;电子探针分析元素分布等,以期找出析出相的结构、形貌、数量及分布等与性能的关系。一试样本文所研究的堆焊材料成分见表1。所用焊丝为H1Cr13,H08两种、碳化硼含量有1%、2%、3%三
In order to develop a valve sealing material with good abrasion resistance and long service life, the relationship between the performance of surfacing layer and the structure of the material was explored. The structure of the sealing surface of the Cr-Mn-B valve was analyzed. In this paper, a variety of techniques in modern metallographic analysis, including potentiostatic etching, deep electrolytic etching; optical microscopy and scanning electron microscopy to observe the wear surface and its three-dimensional morphology; quantitative electrolytic extraction, determination of the second phase content; magnetic The content of ferrite, the structure of X-ray diffraction, the distribution of elements by electron probe and so on were analyzed in order to find out the relationship between the structure, morphology, quantity and distribution of precipitates and their properties. A sample of the study of the composition of the surfacing materials in Table 1. The wire used is H1Cr13, H08 two, boron carbide content of 1%, 2%, 3% of the three